What, you might ask, were they sinking? Out there on Lake Mendota within splashing distance of the Union Terrace on Friday afternoon was a flotilla built and crewed by students from UW-Madison groups, Greek chapters and residence halls, all participating in the cardboard-barge race. One of the first events in the buildup to Homecoming, the 17 vessels were built from cardboard, plastic and tape. The object: to race from pier to pier and not sink.